Dry-Packs 1gm Moisture Absorbing Silica Gel Indicating Packets, Pack Of 20 Moisture absorbing dry-packs protect against mildew, corrosion and fogging Package contains 20 of the indicating silica gel dry-packs, measuring about 7/8-inch by 1 1/2-inch per packet and weighs 1gm each packet The dry-packs are packaged in an air tight aluminum moisture barrier bag and come heat sealed from manufacture (as pictured) Dry-packs silica gel is reformulated to eliminate cobalt chloride (ii) and will turn from yellow to dark green